Home / 20,666.39-28,520.03-11,235.56

Finding the Fourth Proportional to 20,666.39, 28,520.03 and 11,235.56

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Solution

The fourth proportional to 20,666.39, 28,520.03 and 11,235.56 is: 15,505.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,666.39 : 28,520.03 = 11,235.56 : x
  2. Step 2: Convert to fraction form
    20,666.39/28,520.03 = 11,235.56/x
  3. Step 3: Cross multiply
    20,666.39x = 28,520.03 × 11,235.56
  4. Step 4: Simplify right side
    20,666.39x = 320,438,393.76
  5. Step 5: Solve for x
    x = 320,438,393.76/20,666.39
  6. Step 6: Final answer
    x = 15,505.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.